Java/Java Properties/Scala language support

[arcticicestudio]

Implement optimized styles for Java entities for the milestone backlog core 📦 language-java and language-scala packages.
The language-java package includes the .source.java-properties CSS class for Java Property styling.

Java

1. Primitive types (int, float, double, String, boolean ...) should differ from classes
2. Package imports should be colored
3. Classes should be colored
4. Annotations should be colored
5. The instanceof keyword should be colored as keyword
6. Brackets (<>) should be colored as special punctuations

Scala

1. Package imports should be colored
2. Import variables should be colored
3. Classes should be colored

Java Properties

1. Key Pairs should be colored
2. Meta punctuations should have the corresponding punctuations